I have a geeetech prusa i3 pro C. I had several issued, i managed to solve with help of this board.
Now i'm printing, but still have issues.
I add the auto bed leveling, so it would be easier to calibrate, but not so much confused smiley
I use an inductive sensor (LJ18 A3-8-Z/BX sol - 36 V 8 mm) and a sensor mount without servo. I add an aluminium paper from kitchen beetween the Bed and the Glass. Sensor work fine with this configuration.
I use Host Repertier Mac, and Slic3r (last version), MArlin Firmware 1.0.2, PLA, with bed at 70°, extruder 180°.
I don't use the Grid system, cause i can't manage to have the probe at good position. So i use the 3 points system, which works. (not really as you will see)
I used several tutorials and Youtube video, but unfortunatly i can't manage to solve my problem.
My problem is: beetween 2 auto bed leveling, i get difference results. Even if i try 2 calibration, without printing beetween, i have different result
Bed x: 33.00 y: 30.00 z: -1.49
1min after, i redo the test
Bed x: 33.00 y: 30.00 z: 2.90
For this exemple, I didnt move anything, didn't print, didn't change conditions and any parameter, i did the 2 probing one after the other.
So at the end, i can never trust the autobed leveling, and often have to do emergency stop cause extruder is at a bad distance from glass (touching it, even if the Z stop is triger....;( or to far from glass...
I tryed to compensate this with the Z-offset parameter from Slic3r, but because the Z position is different from auto leveling each time, it doesn't change anything.
Here is my process:
I heat the bead (70°)
and have the following code as Gstart
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M107 M190 S70 ; set bed temperature G90 ; G28 X Y ; Home X Y G29 ; G90 ; ;G1 Z2 F4000 ; useless i thing for me, cause inductive sensor, without servo
Here is my configuration file: (the important part)
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// coarse Endstop Settings #define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors #ifndef ENDSTOPPULLUPS // fine endstop settings: Individual pullups. will be ignored if ENDSTOPPULLUPS is defined // #define ENDSTOPPULLUP_XMAX // #define ENDSTOPPULLUP_YMAX // #define ENDSTOPPULLUP_ZMAX // #define ENDSTOPPULLUP_XMIN // #define ENDSTOPPULLUP_YMIN // #define ENDSTOPPULLUP_ZMIN #endif #ifdef ENDSTOPPULLUPS #define ENDSTOPPULLUP_XMAX #define ENDSTOPPULLUP_YMAX #define ENDSTOPPULLUP_ZMAX #define ENDSTOPPULLUP_XMIN #define ENDSTOPPULLUP_YMIN // #define ENDSTOPPULLUP_ZMIN #endif // The pullups are needed if you directly connect a mechanical endswitch between the signal and ground pins. const bool X_MIN_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop. const bool Y_MIN_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop. const bool Z_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop. const bool X_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop. const bool Y_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop. const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop. #define DISABLE_MAX_ENDSTOPS //#define DISABLE_MIN_ENDSTOPS // Travel limits after homing #define X_MAX_POS 180 #define X_MIN_POS 0 #define Y_MAX_POS 180 #define Y_MIN_POS 0 #define Z_MAX_POS 180 #define Z_MIN_POS 0 define ENABLE_AUTO_BED_LEVELING // Delete the comment to enable (remove // at the start of the line) #define Z_PROBE_REPEATABILITY_TEST // If not commented out, Z-Probe Repeatability test will be included if Auto Bed Leveling is Enabled. #ifdef ENABLE_AUTO_BED_LEVELING // There are 2 different ways to pick the X and Y locations to probe: // - "grid" mode // Probe every point in a rectangular grid // You must specify the rectangle, and the density of sample points // This mode is preferred because there are more measurements. // It used to be called ACCURATE_BED_LEVELING but "grid" is more descriptive // - "3-point" mode // Probe 3 arbitrary points on the bed (that aren't colinear) // You must specify the X & Y coordinates of all 3 points // #define AUTO_BED_LEVELING_GRID // with AUTO_BED_LEVELING_GRID, the bed is sampled in a // AUTO_BED_LEVELING_GRID_POINTSxAUTO_BED_LEVELING_GRID_POINTS grid // and least squares solution is calculated // Note: this feature occupies 10'206 byte #ifdef AUTO_BED_LEVELING_GRID // set the rectangle in which to probe #define LEFT_PROBE_BED_POSITION 33 #define RIGHT_PROBE_BED_POSITION 180 #define BACK_PROBE_BED_POSITION 159 #define FRONT_PROBE_BED_POSITION 30 // set the number of grid points per dimension // I wouldn't see a reason to go above 3 (=9 probing points on the bed) #define AUTO_BED_LEVELING_GRID_POINTS 2 #else // not AUTO_BED_LEVELING_GRID // with no grid, just probe 3 arbitrary points. A simple cross-product // is used to esimate the plane of the print bed #define ABL_PROBE_PT_1_X 20 #define ABL_PROBE_PT_1_Y 110 #define ABL_PROBE_PT_2_X 60 #define ABL_PROBE_PT_2_Y 90 #define ABL_PROBE_PT_3_X 80 #define ABL_PROBE_PT_3_Y 50 #endif // AUTO_BED_LEVELING_GRID // these are the offsets to the probe relative to the extruder tip (Hotend - Probe) // X and Y offsets must be integers #define X_PROBE_OFFSET_FROM_EXTRUDER -73 #define Y_PROBE_OFFSET_FROM_EXTRUDER -64 #define Z_PROBE_OFFSET_FROM_EXTRUDER -0.6 #define Z_SAFE_HOMING // This feature is meant to avoid Z homing with probe outside the bed area.
Thanks for your help and suggestions